Process of manufacturing power-gas.



No. 841,499. PATENTED JAN. 15, 1907. E. FLEISGHER. PROCESS OF MANUFACTURING POWER GAS.

APPLICATION FILED NOV. 30, 1904.

'MJJM ,Jl wm constitutes this invention the object is atflora of Saxony, German Empire, have inter-vapors and other easily-condensable EJhlliifilfi STATES rarnn r @FiTiQE JAKOB EDUARD l'ERMANY.

G OLDSUHMID, OF FRAINKFOR'I ON THE MAIN,

PROCE$$ QF MANUFACTURING POWER-GAS.

To all w/wm/ it mug concern:

Be it known that I, EMIL FLEISCIIER, docl tor of philosophy, chemist, residing at 32 l Tiergartenstrasse, Dresden-Strehlen, Kingvented certain new and useful Improvements in Processes of Manufacturing lower- Gas, of which the following is a specification.

This invention relates to that class of processes for the manufacture of power-ga in which air is drawn into a gas-generator from above and from below while the combustible gas produced is drawn off laterally through an exhaust-pipe opening into the apparatus about midway of its height, and has for its object to enable the employment in such gas-generators of bituminous fuels, lignite, sawdust, and other combustible materials the use of which has hitherto been deemed impracticable for power-gas manufacture.

The direct production of a gas free from roducts presents difficulties which it has een sought to overcome in various ways. One expedient which has been resorted to consists in placing the internal orifice of the exhaust-pipe at such a low level that'the hydrocarbons produced have to percolate in their passage to the exhaust through an in? candcscent stratum of fuel, whereby they undergo decomposition.

According to the improved process which taincd according to a procedure different from that above referred to, based on the employment of a method of conducting or contro-llii'ig the changes which are caused to take place in the upper region of the gas-generatm', whereby the hydrouu'bons suffer decomposition or combustion immediately on their formation, the particular manner in which the air is supplied being instrumental in the proper conduct orcontrol of the said 1 changes.

In the ease of so-called suction gas-gen erators it has been the practice to admit the air in such manner thatit is constrained by I suction to enter the generator from above, passing through the whole upper surface of the charge of fuel presented to it and also vention, howeyer, the air is caused to. act o- Specifieationof Letters Patent. Application filed novembei efi, 1904. Serial No- 234.933.

Patented Jan. 15,1907.

bringing about the combustion at this point of the tar-vapors and other products resulting from the combustion in the uppermost part of the generator.

it has been found that when the air is simply admitted to the whole upper surface complete-c unln1stion of the hydrocarbons pro duced cannot be ell'ectcd, because these products, so to speak, always travel in front ofthe air supporting the combustion, and consequently altogether escape being acted upon by the latter. 7

In consequence of'the conditions I have specified, which obtain in generators as heretofore in use having a simple undivided upper air-supply, the* tar-vapors, since they cannot be burned, must be decomposed by passage through incandescent coke.

According to the present invention these deleterious products of. the fuelviz, the tarvaporsare burned at a third point, to which air is led, whereby the requisite quantity of air must be supplied from a central position outwardly in the manner hereinafter specilied.

In suction gas generators of the type specified the gases are exhausted or withdrawn through an annular channel on about the level of the middle height of the charge, which remains unobstructed, debouching into an inclined channel which extends downwardly and inwardly toward the charge so that all the gas generated is free to escape by way of the inclined channel into the annular channel to the main, which is connected to. the latter. On account of this lateral exhaustion of the gases it is necessary that the air should be supplied to the generator approximately along its vertical axis, so as to pass to thecenter of the charge in order that it shall with certainty traverse not only the lateral but also the central portion'of the charge, for if the air were supplied peripherally it could simply pass close alone walls of tic: generator, so that column oi combustible matcria main untraverscd by it; but, in or, not only must the secondary air-supply (V which I mean the air supplied to the abovementioned third point of entry) be central, from below. According to the presentpin "b it this air inust also;impinge on the com-- [the fuel at a third point,with the object of .nstiblei'aiaha,point" somewhat beneath its surface, so as to come into contact with the the ireshly introduced con-h) through which flank, so to speak, of the tor-vapors, and thereby effect the combustion of the latter in a satisfactory menner. Thism-bject may be attained in vari is manners. The sim plest expedient is to provide an air-pipe (preferably cooled) extending from above downward to a greater or lesser depth in the combustible stratum; but it has been found more practicable to employ instead ofthis pipe a ring either open or filrnished with a rotective roof. This ring should he oi" such a Width that the coal or coke lying beneath its lower margin may in taking u its natural angle of inclination form awire tunnel or crater thereunder into which the secondary air may freely enter.

By the time that the fuel arrives in the vicinity of the lower margin of the ring-it willhave lost its gases and vapors, so that the crater already .ofi'ers to the secondary air a strongly-degasified combustible. Now

i this is important, because a very high tem- 'ing the ring to a perature is produced in the crnter'by the introduction thereinto of the secondary air, and therefore also the air for the combustion of the tarwapors which it eneounters'is strongly heated preliminarily. By adjusthigher or lower position the zone of thesecondaryair, and thereby its action on the fuel, may be varied at will.

A gas generator suitable, for carrying out the process is illustrated in the accompanying drawing, which shows tion of the ap aratus.

o is the b0 y of the apparatus, provided with a grate b and an tin-supply pipe 0, as.

an ply or an evaporating-dish d and with'an as hole.

The owebgas is drawn as itsrdu l h the pipe 9, either y means of a s 'eciale oust pum or b the 'motoritself, emthe ennu-v er a snne' h, whichbccupies a osition in the enerator above the conical s ope of the combustible. Y

In the upper part of the generator the ring m is so set as mallow of it-sheight being adjusted, and it is closed by a roof n and furnished with lateral slits 9, (above the levelol' a central vertical sec my invention 1 have the air can gain access to thejnterior of the ring. The fuel is supplied'to the space (1 around the ring, this space being left open at top, so that the nir has access to thei'r'esh fuel from above only, this arrangement allowing ol' the easy breaking up tuel which tends t0 cake together.

Beneath the lower edge 7 of the ring is formed the huinel-shaped crater .9, into which the secondary air enters, passing through the {no and burning the products of comhusrion end distillation produced in the upper pert oi" the some to form fixed gases,

which latter in traversing thereafter the lowing coke are for the most part i2't'ZlS- ihrmrd into carbon monoxid and hydrogen, (together with nitrogen.) 1t Wlii be evident modified.

For example, a pyramidal grate that-this arrangement mtw be variously may be provided whose bars extend as for upward as the 11. per stratum-0t fuel.

Now What I c aim, and desire to secure by Letters Patent, is the following: J

1. In the process of manufacturing powergas from bituminous fuel and the like with top and bottom air-supplv and) exhaust of the gases at the mid-height I the auxiliary step. of supplying v body of air below the point at'w h the top air-supply takes place and in or in t eheighborhood of the vertical axis of thefiehargen 'nd'ditional Off, the ,eherge 2. In the process of manufect ring ppwergas from bituminous fuel and the' hlge with top and bottom air-supply and exhailst of the gases at the mid-height of the charge, the auxiliary-step of forming a free crater of the charge in the axis of the generator and beneaththe upper surface of the charge and supplying air to this crater in addition to the main top and bottom supply.

:In' testimony that I claim the foregoing as signed my name, in

A ovember, 1904.

EMIL FLEISCHER.

Witnesses:

PAUL E. SCIIILLING. PAUL AnRAs.

piresence of two witnesses, this 21st day of 

